# import sys
# file = sys.stdout
# file.write('Hello')
#
# print('World')

file = open('test.txt', 'r', encoding='utf-8')
print(file.read(3))

# 不需要写close
with open('test.txt', 'r', encoding='utf-8') as file2:
    list2 = file2.readlines()
    print(list2)

str = 'day day up'
with open('test.txt', 'w', encoding='utf-8') as file3:
    file3.write(str)

list3 = ['hello11', 'world22']
with open('test.txt', 'a', encoding='utf-8') as file4:
    file4.writelines(list3)
file = open('test.txt', 'rb')
print(file.read(1))
print(file.read(1))
print(file.tell())
print(file.seek(2, 1))
